Oil burner



N. E. TYRRELL May 20 1924.

OIL BURNER Filed March 20. I922 ldetent M E924 NT FFl.

Application. one must m, teas. seen at. scenes.

ers, and has for its object to produce an eihcient burner wherebyperfect combustion can be had Without the noise invariably attendantupon the operation of a power burner in which gasification occurs in aconfined space prior to ignition as in a pipe or retort, or where thefuel is atomized under the force \of a blast. I

It is well known that liquid burns without noise in an open pan or whereotherwise unconfined, and I have discovered that efiicient combustioncan be obtained with but little attendant noise, by discharging fuel inliquid form and air under pressure into an open pan located in acombustion chamber.

Another ob'ect is to produce an oil burner in which the oil is fed bygravity to a. pan located in a fire chamber and air is employed to guardagainst premature gasification ofthe fuel and to efiect vaporizationthereof in an unconfined space in the pan.

A further object is to produce a simple, durable and economicalconstruction, by which the above objects are accomplished, and by whichthe combustible -mixture thus produce is uniformly distributed radiallywithin and radially discharged upwardly from the pan into the combustionchamber.

With the objects named in view the in rention consists in certain noveland useful features of construction and organization of parts, ashereinafter described and claimed; and in order that it may be fullyunderstood, reference is to be had to thev accompanying drawing, inwhich Figure l is a vertical section taken through the burner inoperative relation with a furnace;

Figure 2 is a top plan view of the burner;

Figure 3 is a top plan view of the fire pan and l Fi red is a section onthe line IV-IV ofhlgureh' n lln the said drawing, where like referencecharacters identify corresponding parts in all of the figures, 1illustrates a furnace of any of the common and well known types, and 2the fuel door opening thereof, which, as illustrated, is closed by firebrick or the like, and provided with a lighting port 4. The draft uthrough the grate of the furnace is cut off as indicated at 5, andresting on the grate bars is a fire pan 6, the wall of which slopesupwardly and outwardly in order to direct the flame radially upwardagainst the walls of the combustion chamber, said pan being suitablyinsulated as'at 7 from the grate bars, to provide a staple support forand prevent air leaks around the pan.

The fire pan is formed centrally of its bottom with a conical projection8 on the axis of which the liquid fuel is adapted to impinge, as will bepointed out hereinbelow, and be thereby evenly distributed in alldirections over the bottom of the fire pan. A series of upstanding lugs9 provided with suitable bolt openings, are formed on the floor ofthe-fire pan, and each of said lugs is uipped with an extension 10 ofless vvidt than the lug, as shown in the drawing to avoid unnecessaryrestriction of the space between the bottom of the fire pan and theperiphery of the flaring-mouthed dis charge nozzle 11, said nozzle beingsecured in position on an air-supply pipe, hereinafter described, bymeans of a set screw 12. The outer periphery of the nozzle is formedwith a series of perforated ears 13 for engagement by bolts 14 extendingfrom the pan, to securely clamp and hold the nozzle upon the extensions10. In this connection it is desirable to point out that the distancebetween the periphery of the nozzle mouth and the bottom of the firepan, is such that the a'rea of the discharge opening is substantiallyequal to the cross sectional area of the air-supply pipe, so that thepressure of air forced through the pipe is not decreased or increased asit would be if the flow was impeded by passage through the dischargeopening formed between the nozzle and the bottom of the fire pan if thespace between the same was greater or less than the cross sectional areaof the air ipe.

' Connects to the upper end of the nozzle 20, of the supply of air maybe varied to and held in position by means of the set' screw 12; is avertical pipe 15 communicatinglat its upper end with an-elbow 16 1ncommunication with a pipe 17 extending exteriorly of the furnace throughthe fue door closure, andterminatin m a T-c oupling 18, oneof'thebranches 0 said coupling being connected to a pipe 18 leading to ablower 19, which is preferably rotated by means of a -variable s delectric motor suit conditions by means of a damper-controlled airintake 21. 1

Within the pipe 15 and terminatmg a short distance above the lower endthereof, is a gas-feed pipe 22, connected at its upper end to an elbow23, which in turn is connected to a as-feed pipe 24 located centrally ofthe aireed pipe 17, and thereby insulated from the heatof the combustionchamber by the air in said pipe 17. The outer end of the pipe 24 passesthrou h a bushing 25 in the third arm of the -couphng 18, and isconnected to a T-couplmg 28, having. one of its arms in communicationwith a gas-supply pipe 27 controlled by a hand ll 11 11 t m 1 ocatecentra y o e as-supp y p1 24 and spaced therefrom i n any suitab emanner is a liquid fuel or oil-supp] p1 29 which has its discharge end,pre erab y within the elbow 23, at a point directly above the point ofthe cone8 of the fire pan so that oil flowing from said pipe shall alldirectly on the cone and be evenly distributed in all directions overthe bottom of the fire pan, and it will be a parent, in this connection,that the oil-supp y pi will be insulated from heat of the combustionchamber to prevent premature gasification of such fuel, by the gas-feedipe 24 and also by the air-feed pipe 17. e pi e 29 asses exteriorly ofthe third arm 0 the -couplin 26 and communicates with a avity fee pipe30 leading from a suitab e source of oil supply, a needle valve 31 beingemployed to control pipe 30,

The operation of the device is substantially, as follows: The as isturned on and ignited in any suitab e manner, through lighting ort 4,and as soon as the fire pan becomes ot, the oil valve is slightly 0 nedto permit of a slow flow of oil throng the pipe 29 from which it willdrop thro h ipe 22, u on the hot cone 8 and be eve y distributed in alldirections. This oil will be gasified upon coming into contact with thefire pan and will burn in combination with the gas flowing through theipe 22. When the oil has gasified and is urning, the blower is. startedat slow speed, 1f equipped with a variable s d'motor, or if not, t e damr is so regu ated as to limit the air su y, and the heat of the flameupon the a 'tion of the supply of air under fices of small size and inclose pressure, to t e upper end of t trance point of t pressure isgreatly increased. The gas supply may now be cut off and the oil and anwill be no appreciable amount of nolse.

It'will be apparent that as the oil burner embodying the invention hasno jets or oriproximity to the flame, the possibility of inefliciency ofoperation due to incrustation of and clogv gulrg' with carbon iseliminated.

mm the above description it will be a 1 parent that I- have produced adevice of t e' character described, which possesses all of the featuresof advantageset forth as desirawe, and while I have describedand claimedthe preferred embodiment of the same, I

reserve the right to make all changes properly fallingwithinthe spiritand scope of the a 'pen (1 claims.

c aim: r

1. In anoil burner, a fire an having a central conical projection rismgfrom the bottom an 11 right air-supply ipe terminating at its ower endina nozrHe disposed concentrically of and above the bottom of the an andspaced therefrom to provide a disc arge opening of substantially thesame capacity as the cross-sectional area of the ear-supply pi e, meansto supplly air under e air-supply pipe, an upright insulating pipewithin and spaced from the air-supply ppe, and terminating short of thelower en ofthe latter, and means to drop oil down throu h the insulatingpipe and upon the apex o the conical projection without contact with thesaid insu ating pipe 2. The com ination with a furnace having acontrolled ignitionport, a fire pan within the combustion chamber of thefurnace, having a central conical projection rising from the bottom, anair-supply pipe extending 1 into the furnace and terminating in adowntumed discharge end disposed centrally of and above the fire pan andprovided at its lower end, withing the pin, with a flaring nozzle,concentric of the conical projection,

means to supply air under pressure, to said supply pipe, exteriorly ofthe furnace, at s su ply pipe extending into and spaced m t e air-supplyPipe except at the ene ormer into the latter,

and terminatin in a depending part communicating wit the air-suppl pipenear the nozzle thereof and vertical y above the said conicalprojection, and an oil-supply pipe extending into and replaced from thegas-supply ipe except at t 0 point of entrance of t e former into thelatter, the

dischar e end of the oil-sup ly pipe bein in vertl cal alinement withthe bore of th% de ending part of the -sup ly ipe so from the air-sup 1yi and terminatin tha t oil can be droppefiireotfy cite the short of thelow r eii of the letter, an 10 conical projection. means to drop oildown through the insu- 3. In an oil burner, an upright air-supply latingpipe without contact with the said 5 pipe terminating at its lower endin a nozinsulating pipe.

zle, means to sup 1y air under pressure to In witness whereof I hereuntoaflix my the upper end. of t e air-suggly plpe, an upsignature. rightinsulating pipe wit 'u and spaced NATHAN Ea TYRRELL.

